Hello, I have a GridComboBoxColumn with IsEditable set to true and I want to handle the entered text.

XAML:
<syncfusion:SfDataGrid
x:Name="LessonsDataGrid"
AddNewRowPosition="Bottom"
AllowEditing="True"
EditTrigger="OnDoubleTap"
ItemsSource="{Binding EmployeeLessons}"
NavigationMode="Cell"
SelectionMode="Extended">
<syncfusion:SfDataGrid.Columns>
<syncfusion:GridComboBoxColumn
DisplayMemberPath="Lesson"
HeaderText="Lesson"
IsEditable="True"
ItemsSource="{Binding Lessons}"
MappingName="Lesson"
SelectedValuePath="Lesson" />
<syncfusion:GridComboBoxColumn
DisplayMemberPath="Level"
HeaderText="Level"
IsEditable="True"
ItemsSource="{Binding Levels}"
MappingName="Level"
SelectedValuePath="Level" />
<syncfusion:GridComboBoxColumn
DisplayMemberPath="Class"
HeaderText="Class"
IsEditable="True"
ItemsSource="{Binding Classes}"
MappingName="Class"
SelectedValuePath="Class" />
</syncfusion:SfDataGrid.Columns>
</syncfusion:SfDataGrid>